Unwrapping mechanism for yarn chains.



No. 745,993. PATENTED DEG. 8,1903. W. BAXTER. UNWRAPPING MECHANISM FOR YARN CHAINS.

APPLICATION FILED SEPT. 21, 1903.

H0 MODEL.

NIL 3AM AHJR, OF FITCHBURG, MASSACHUSETTS, ASSIGNOR TO DRAPEB. COMPANY, OF HOPEDALE, MASSACHUSETTS, A CORPO- RATION OF Patented. December 8, 1.9 33.

$PECIIFZCATEOI-T forming part of Letters Patent No. 745,993, dated December 1 3- .ipplioation filed September 21,1903. eriai No. 1731998 (N od -i Be it known that i, 'WILLIA); BAXTER, a subject of the King of Great Britain, and a resident of Fitchburg, county ofWorcester, State or" Massa husetts, have invented an improvement in Unwrapping Mechanism for Yarn Chain of which the following description, connection v the accompanying drawings, is a specification, like letters and igures on the drawings representing like parts.

This invention relates to apparatus for removing the wrapping-cord from a yarn chain of the general type forming the subject-matter of United States Patenthio. 550,656,dated December S, 1895. In such patent the chain is moved. longitudinaiiy at a certain speed and the cord is unwrapped therefrom by a rotary unwrapping mechanism and wound upon a cord-receiver, means being provided to vary the ratio between the linear speed of the chain and the rotary speed of said unwrapping mechanism. The latter includes a flier having guide-eves through which the cord passes to-the spool or receiver, and between said eyes the cord cooperates with and maintains inoperative a latch mounted on the flier. Upon breakage or slackening of the cord during the unwrapping process the latch is relea l and immediately assumes its operative position, and the rotation of the flier the latch to engage and operate a hnoclvot't lever, thereby etfect the actuation of suitable stopping mechanism for the machine. it has been found in practice that sometimes the flier will rotate one or more times after the n tial operation of the knockoff lever, so it t .e latter will again be struck by the iatch, inasmuch as the lever returns to normal position after it has acted to effect the actuation of the stopping mechliiy present irvention has for its object the production 0 pie and effective means to obviate the unn ces"ary and objectionable reenga enient of latch and knock-off lever after the same has been properly operated. Such reengagement is objectionable, because it tends to unduly wear the parts and sometimes results in injury to either the latch or the lover.

The various novel features of my invention wilioe described in the subjoined specification and particularly pointed out in the following claims.

Figure l is a detail in side elevation of a sufficient portion of an apparatus for unwrapping yarn chains to be understood with one embodiment of my invention applied thereto, the parts being in normal position. Fig. 2 is a top or plan view of the mechanism shown in Fig. 1; and Fig. 3 is a detail in plan of the shipper loci; or detcnt, to be described.

in the drawings, Figs. 1 and 2, I have only shown enough of the apparatus to be understood. The main driving-shaft A having fast and loose pulleys B and B thereon, the cord receiver or spool S, mounted on the upper end of the traverse-tube g, the bevel-gear (1, E1 1, having its hollow hub extended through a sleeve-like bearing 61', secured to the main frame, and the flier F, secured to the upper end of the said huh, may be and are all substantially as in United States Patent No. 550,656. The tube g passes through the hub of the gear d and in practice is vertically reciprocated, as shown in said patent. Herein I have omitted the intervening connections between the shaft A and the gear at, as such connections form no part of my invention and may be all as shown and described in the patent aforesaid, it being understood that the chain L is drawn down through the traverse-tube g by suitable means, (not shown in detail herein,) while the wrapping-cord L is unwound from the chain and wound upon the receiver S by the unwrapping mechanism. The latter is shown as a flier F, comprising the circular rimfand supporting-arms f, bent outwardly at their upper ends, his .1 and 2, one of said arms being slotted at f in its horizontal and upright portions, and a latch or aotuatorf' is pivoted at f in the slot, the latch having an eyef uormaliy interposed between guide-eyes f and f the former being located at the outer end of the slotted horizontal arm and the latter at the upper end of the slotted upright of the flier, as in said patent. As therein provided, the end of the wrapping-cord L, Fi l, which has been detached from the yarn chain, is passed through the guide-eyef then through the latch-eye f, and finally through guide-eye f passing thence to the receiver S. WVhen the cord is being properly unwrapped, the tension thereof will lift the latch or actuator, so that it will be free to revolve with the flier, and the unwrapping of the yarn chain will proceed. If the cord breaks or slackens, however, the actuator f will be permitted to drop into dotted-line position, Fig. 1, and in the rotation of the fiier the inner end of the actuator will then be brought against the upturned arm h of a knock-olf member or lever h 7L2, fast on a rock-shaft 77/. Such engagement of the actuator and knock-off member tilts the latter, turning the rock-shaft h and withdrawing the depending portion or finger ha of said member from a notch h Figs. 2 and 3, in a shipper lock or detent 71 shown as a Hat bar or link pivotally connected at its outer end to the shipper 7L and longitudinally movable in a suitable bearing on the main frame A of the apparatus. The shipper is fulcrumed at 72/ and a strong spring 5 normally tends to draw the outer end of the shipper to the right, Fig. 2, to slide the beltfork B to the left and ship the belt from the fast to the loose pulley. I have shown the belt-fork provided with a hub Z) to slide on a stud b fast on the main frame, said hub having a rigid extension 5, provided with a cross-bar b the outer end of the latter being jointed to the inner end of the shipper, as clearly shown in Fig. 2, the inner end of the cross-bar being slidably supported in a bear ing 76. (See Fig. 1.) When the shipper is in running position, Figs. 1 and 2, the finger 7L2 of the knock-elf member enters the notch h of the shipper lock or detent h and positively maintains the shipper in running position against the pull of the spring s so long as such engagement continues. The tension of the cord governs the latch or actuatorf for the stop-motion, and the leverage exerted by said actuator on the arm his amply sufficient to tilt it enough to withdraw the finger b from the notch h In practice it is found that sometimes the flier may rotate one or more times after the belt has been shipped, and the actuator strikes the arm h on each revolution, causing undue wear of the parts and at times injuring them. Herein I have provided means to retain the arm it out of the path of the actuator after initial engagement of said parts, and the movement of the shipper to running position to start the apparatus is made effective to automatically release the knock-0d member, so that it will reengage with the detent if.

A catch at is fulcrumed on a stud m carried by an ear 78 on the main frame A, the free end of the catch being normally held against the flat outer face of the finger 7L2 by a suitable spring 8 Figs. 1 and 2; but when the finger is withdrawn from the detent h the spring 3 immediately throws the free end of the catch in front of the finger and holds it and the upturned arm h in tilted position with the arm h out of the path of the actuator f The catch has a rearward extension or tail m, which projects in front of the inner end of the cross-bar b and when the shipper is released the said cross-bar is moved outward away from the tail m. \Vhen the operator moves the shipper to running position, however, the cross-bar is moved inward and hits the tail, swinging the catch m to the left, Fig. 2, from in front of the finger 72, and the knock-off member is returned to operative position (shown in the drawings) by the action of the spring 5 Figs. 1 and 2, attached to a depending extension 71 of the finger 71 A slight clearance is permitted between the tail m and cross bar b as shown in Fig. 2, corresponding to the clearance provided for in the notch h inasmuch as the operator in moving the shipper to running position always moves it as far as it will go to insure engagement of the finger 7L2 in the said notch. The releasing movement of the shipper is limited by a stop-lug h on the detent 7213, which stop-lug engages the side of the frame when the shipper is released.

My invention is not restricted to the precise construction and arrangement shown and described herein, as the same may be modified or changed in various details without departing from the spirit and scope of my invention.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In an apparatus for unwrapping yarn chains, a receiver, means to unwrap the cord and wind it upon the receiver, a stop-motion for the apparatus,includinga knock-oft member,arevolvingactuatortherefor rendered operative by slackening or breakage of the cord, and a device to prevent reengagementof the actuator and knock-01f member after the latter has been actuated.

2. In an apparatus for unwrapping yarn chains, a receiver, means to unwrap the cord and wind it upon the receiver, a stop-motion for the apparatus, including aknock -off member, a revolving actuator therefor rendered operative by slackening or breakage of the cord, and a device to cooperate with the knock-0E member and maintain it out of the path of the actuator subsequent to initial engagement therewith.

3. In an apparatus for unwrapping yarn chains, a receiver, a positively-rotated flier to unwrap the cord and windit upon the receiver, a stop-motion for the apparatus, includinga knock-off member, an actuator therefor on the flier and rendered operative by slackening or breakage of the cord, and a device to prevent reengagement of the actuator and knock-off member after the latter has been actuated.

4. In an apparatus for unwrapping yarn chains, a receiver, means to unwrap the cord ceases and wind it upon the receiver, a stop-motion for the apparatus, includingaknock-off member,a revolving actuator operative upon slackening or breakage of the cord to tilt the knockolf member, and a catch to retain said member in tilted posit-ion after it has been tilted.

5. In an apparatus for unwrapping yarn chains, areceiver, a positively-rotated flier to unwrap the cord and wind it upon the receiver, a stop-motion for the apparatus, includinga knock-off lever, an actuator therefor carried by the flier and rendered operative by slackening or breakage of the cord to tilt said lever, and a catch to automatically cooperate with the lever when tilted and retain it out of the path of the actuator.

6. In an apparatus for unwrapping, yarn chains, a receiver, means to unwrap the cord and wind it upon the receiver, a stop-motion for the apparatus, includingashipper, a lock therefor, and a tilting lever to normally cooperate therewith, a revolving actuator rendered operative by slackening or breakage of the cord to engage and tilt said lever and reease the shipper-lock, and a catch to automatically cooperate with the lever when tilted and retain it out of the path of the actuator.

7. In an apparatus for unwrapping yarn chains, a receiver, means to unwrap the cord and wind it upon the receiver, a stop-motion for the apparatus, including a shipper, and a knock-off lever therefor, a revolving actuator rendered operative by slackening or breakage of the cord to engage and move the lever to release the shipper, a catch to automatically cooperate with said lever when so moved and retain it out of the path of the actuator, and means operated by movement of the shipper to running position to disengage the lever from the catch.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

WILLIAM BAXTER.

- Witnesses:

GEORGE W. DUNN, RUSSELL B. LOWE. 

